Karo - Ender 3 cooling fan duct

prusaprinters

<h3>Can't print a lattice cube? Ring coolers don't help much? Too lazy to print a Bullseye or Hero duct?</h3><p>The Karo cooling fan duct was designed with the following considerations:</p><ul><li>I want to actually be able to print a 3x3 lattice cube without the print being destroyed due to edges bending up</li><li>I really don't want to remount BL Touch because recalibrating that is just extra work</li><li>Try to make it crash into glass clips a bit less (more Y clearance)</li><li>Print in one piece</li><li>No supports&nbsp;</li></ul><p>Finished lattice photos are (relative to the cooler) from the side and from behind.</p><h3>Notes</h3><p><strong>After installing, make sure the cooler fan does not collide with the duct.</strong> If it does, take a knife to the pointy bit and cut off the leading edge a bit.</p><p>(V1) (The air wedge might be completely useless for all I know. Though I do know for a fact that some of the air is being blown away from the fan. I haven't done any fluid simulations of the sort. Reading a paper titled "An optimal design algorithm for centrifugal fans: Theoretical and experimental studies" would probably have helped if I thought to look it up ahead of time.)</p><p>It's named Karo because the skirt is sorta like a diamond shape, but naming it "Diamond" would probably be overestimating its performance.</p><p>Lattice cube in photos: <a href="https://www.thingiverse.com/thing:1804350">https://www.thingiverse.com/thing:1804350</a> (3x3x3 Lattice cube v4)</p><h3>Changelog</h3><p>v1 - 2019-03-03 - Initial release<br>v2 - 2019-04-20 - Adds notch for improved ambient cooling, changes volute tongue angle to 90° (appears to improve air flow but increases noise slightly)</p><h3>Print Settings</h3><p><strong>Printer Brand:</strong></p><p>Creality</p><p><strong>Printer:&nbsp;</strong></p><p>Ender 3</p><p><strong>Rafts:</strong></p><p>No</p><p><strong>Supports:&nbsp;</strong></p><p>No</p><p><strong>Resolution:</strong></p><p>0.2</p><p><strong>Infill:&nbsp;</strong></p><p>20</p><p><br><strong>Filament:</strong><br>Any PLA (or the hottest you use)&nbsp;<br>&nbsp;</p><p><strong>Notes:&nbsp;</strong></p><p>No need for fancy settings. 0.2 mm layer height, 2 walls, 20% infill should work fine.</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>Category: 3D Printer Parts</p>